Adolph olsen



Ilirn STATES PATENT OFFICE.

ADOLPH OLSEN, OF BOSTON, MASSACHUSETTS, ASSIGNOR OF ONE-HALF TO ALBERT HABERSTROH, FRANK A. LUDVIG, AND CHARLES J. OLSEN, ALL OF SAME PLACE.

VENTI LATO R.

SPECIFICATION forming part of Letters Patent No. 318,494, dated P/Iay 26, 1885.

Application filed March 18, 1885. (No model.)

To aZZ whom it may co c perforated plates or wire-nettings c c c, as

Be it known that I, ADoLrH OLsEN, residshown in Figs. 1 and 3, through which the ing at Boston, in the county of Suffolk and fresh air is permitted to enter, to the exclu- State of Massachusetts, have invented certain sion of dust and insects.

new and useful Improvements in Ventilators; To the innermost one of the series of hinged 5 5 and I do hereby declare that the same are sides 0 c is secured the cover 0, which may be fully described in the following specification solid or provided with a transparent, opaque, and illustratedin the accompanying drawings. colored, or ornamental pane of glass, C, as

This invention relates to improvements in may be desired.

[o ventilators, and it is carried out as follows, To effect a tightjoint at thejunction of the 60 reference beinghad totheaccornpanying drawlower portions of cover C and frame a, I overings, where lap the edges of such parts to form a pocket Figure 1 represents a perspective View of joint, C, (shown in Fig. 3,) by which the outer the improved ventilator as expanded while air is excluded from entering at thelower part in use, and Fig. 2 represents it in a closed of the ventilator, whether the latter is closed 65 position. Fig. 3 represents a central longior open. In a similar mannerI overlap the tudinal section of the invention; and Fig. 4 meeting edges of the respective hinged sides represents a cross section on the line A B, c c c and stationary sides a a, so as to form shown in Fig. 3. pocket-joints c c c, as shown in Fig. 4, by

Similar letters refer to similar parts wherwhich the outer air is prevented from enter- 7o ever they occur on the different parts of the ing the room from the sides of the ventilator, drawings. and by these means all unpleasant side drafts The invention has for its object to permit are entirely obviated, while at the same time fresh air to enter a room, and in so doing to the whole current of fresh air is directed upconduct the air into the room with an upward ward through the perforated plates or nettings 75 current,and to excludeit from passing through a 0' c 0, thus insuring the best results of a the sides or front of the ventilator, thus obproperlyconstructed ventilator.

I taining the most beneficial results. It is par- I prefer to provide the top and sides of the ticularly well adapted to be attached to a cover Cwith a flanged projection, C adapted 3O window-sash in place of a pane of glass after to fit closely over the inner edges of the frame so the latter is removed, although it is equally a, so as to makea tight joint between such useful for conducting fresh air into rooms parts when the ventilator is closed, as shown through perforations in the walls or doors, as in Fig. 2, in which condition it may be held may be desired. Its front or cover may be by means of a suitable clasp, d, or any other provided with a transparent pane of glass well-known locking device. 3 plain, colored, or ornamented; or the said Having thus fully described the nature, con cover or front may be made solid, to suit struction, and operation of my invention, I tastes and conditions. wish to secure byLetters Patent, and claim The invention consists of the hollow metal The hereindescribed ventilator, consisting 9 frame a, having the inwardly-projecting sides of the frame a a and cover C, hinged together, 0 c a, connected at the top by means of a perin combination with a series of overlapping forated plate or wire-netting, a, as shown in and pocket-jointed side pieces, 0 c", and their Figs. 1, 3, and 4. perforated or netted tops 0 c c, substantially To the lower portion of the frame a a are in a manner and for the purpose as set forth.

hinged, by means of the wire 6, (that may be In testimony whereof Ihave affixed my sig- 5 made as one single piece, as shown in the nature in presence of two witnesses.

drawings; or it may be made as an independ- ADOLPH OLSEN. ent hinge-pin in each end of the frame,) a se- Witnesses: ries of fan-shaped sides, 0 c 0, each pair being ALBAN ANDREN,

o united together at the top by means of the (bus. J. OLSEN. 

